With a heater.
Electricity
appliances that provide heat energy
Mars does not provide heat - it is actually a cold planet. It absorbs a lot of heat from the sun during it's day, but having almost no atmosphere, it radiates that heat right back out into space again at night.
a radiator that provides heat and cooling
Hotsnapz are reusable heat packs that work by activating a chemical reaction when flexed or snapped. This reaction generates heat, which can then be applied to the body to provide heat therapy and pain relief.
You have to heat the pan to make pancakes. The heat index is higher today because the air is also very humid. Warm tropical waters provide the heat energy that powers a hurricane. A bunsen burner is used to provide heat in science experiments.
By one person humping another and they provide heat and babies!
Heat energy.
fluorite
heat energy
If you burn it - sure.
Any external heat source can provide the required energy.